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Finding the Fourth Proportional to 303,305.40, 455,011.61 and 103,578.97

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Solution

The fourth proportional to 303,305.40, 455,011.61 and 103,578.97 is: 155,386.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,305.40 : 455,011.61 = 103,578.97 : x
  2. Step 2: Convert to fraction form
    303,305.40/455,011.61 = 103,578.97/x
  3. Step 3: Cross multiply
    303,305.40x = 455,011.61 × 103,578.97
  4. Step 4: Simplify right side
    303,305.40x = 47,129,633,901.84
  5. Step 5: Solve for x
    x = 47,129,633,901.84/303,305.40
  6. Step 6: Final answer
    x = 155,386.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.